Here are some historical events that happened in the 1970s:

1973 Oil Crisis: An oil embargo by Arab producers against the U.S. deepened the financial crisis of the early 1970s. High oil prices triggered a severe economic crisis.
Watergate scandal: President Richard Nixon resigned after the Watergate scandal
Jimmy Carter Elected President. Viking I Lands on Mars.
Iran Hostage Crisis: The United States had hostages taken in Iran
ESPN: The sports network ESPN debuted
Jaws: The first summer blockbuster movie

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